Comparative analysis between FSO and bidirectional fiber transmission links for Sub-THz transceiver design compatible for future 6G networks

Rangana Banerjee Chaudhuri; Ahmad Atieh; Liam Barry

doi:10.1117/12.3022193

18 June 2024 Comparative analysis between FSO and bidirectional fiber transmission links for Sub-THz transceiver design compatible for future 6G networks

Rangana Banerjee Chaudhuri, Ahmad Atieh, Liam Barry

Author Affiliations +

Proceedings Volume 12994, Terahertz Photonics III; 1299404 (2024) https://doi.org/10.1117/12.3022193
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

A photonic sub-THz transceiver design for use in the remote radio head (RRH) for future high capacity 6G networks that employ THz frequencies is demonstrated. The work studies the backscattering effects when a single fiber is used for fronthauling to and from the RRH. The work also demonstrates replacing the fiber link with free space optical (FSO) channel and draws a comparative analysis between the two optical channels in term of nonlinear effects. Bit error rate (BER) performance for 10Gb/s NRZ signals is measured by varying the received optical power at the uplink photodiode (for a fixed optical launch power) and also by varying the launched optical power at the transmitter side (for a fixed received optical power at the uplink photodiode) for 25 km bidirectional fibre transmission and 25 km of FSO transmission respectively. At +5 dBm optical launch power (received optical power at photodiode being 0.080 dBm), BER is found to be 10^-5while using a single fibre and 10^-7 while using FSO link. This is due to the presence of backscattering effects in single mode fibre when used for bi-directional transmission, which signifies that FSO may be more suitable than optical fiber for sub-THz transceiver designs.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rangana Banerjee Chaudhuri, Ahmad Atieh, and Liam Barry "Comparative analysis between FSO and bidirectional fiber transmission links for Sub-THz transceiver design compatible for future 6G networks", Proc. SPIE 12994, Terahertz Photonics III, 1299404 (18 June 2024); https://doi.org/10.1117/12.3022193

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